A free module present in all PrestaShop installations , the module has always (already with the PrestaShop 1.6 version) suffered from problems related to the management of the Smarty cache. In the PrestaShop 1.7 version it is necessary to exclude the cache by editing the module itself, otherwise it will not display descriptions and prices . Unfortunately the module generates a degradation of the loading times . As valid as it may seem, it must be uninstalled.
It should be emphasized that displaying the products of the same category automatically is not a very useful thing, the product sheet must also be taken care of in the selection of related products.